Re: PET diagnostics

From: Christian Dirks <>
Date: Wed, 11 Dec 2013 21:34:10 +0100
Message-ID: <>
Hi Rob,
the used ROM set should be basic 1 according to
I found a youtube video that claims to show 'A successful pass of the
diagnostic rom':
Unfortunately no further information :(
Could you take a look at the documentation and dongles ?


Am 11.12.2013 21:13, schrieb Rob Clarke:
> Yes, but it was only in the basic 1 ROM set. I have an original set of
> documentation and dongles somewhere if you can't find it on-line.
> I don't recall if it displays anything though, I think it used the red
> LED on the mainboard.
> Rob
> On 11/12/2013 21:08, Christian Dirks wrote:
>> Hi all,
>> does anyone know, if there really is a diagnostic routine in the PET
>> ROMs, and if so, what it should do/display ?
>> When I power up my 2001-8C with the daignostic pin connected to GND, it
>> blanks the screen and nothing more seems to happen.
>> A quick test with a 'hello world' basic program works.
>> The used ROM set is:
>> 6540-019, -013, -015, -016, -012, -014, -018.
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Christian Dirks

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Received on 2013-12-11 21:04:14

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